AUTOMATICALLY SWITCHED OPTICAL NETWORK (ASON)

  AUTOMATICALLY SWITCHED OPTICAL NETWORK (ASON)

Before going to WSON, let’s have a brief look on ASON.

An Automatically Switched Optical Network (ASON) is an "intelligent" optical network that can automatically manage the signalling and routing through the network. Traditionally, it was necessary to configure cross-connections in the Network Elements (such as an optical switch) to create a new traffic path for a customer.

In an ASON, this process can be automated. The customer defines a new path by its start and end point, the bandwidth needed, the Quality of Service and so on. The Network Elements have the necessary processing functions built in to configure the new traffic path. The path itself is not specified by the customer. The ASON network creates a light path through the network for this customer. This traffic path will be changed if the network is changed.

There are three major protocols used in ASON

OSPF (To calculate the shortest path) >> Routing Protocol

RSVP (To reserve the resources and path) >> Signaling Protocol

LMP (Link Verification )>> To check Data and TE link

1. It will automatically select the shortest path in ROADM network
2.  It will help to  reserve the bandwidth and resources
3.  It will Monitor the link failure and all
4.  SPC  >> Electrical >> Circuit Switching >> (Switching Occurs from Cross connection card in ODU0 time slot)
5.  GMPLS suite is formed by the GMPLS protocol itself, are followings
6. GOSPF-TE, GRSVP-TE, LMP & OIF-UNI (Where G stands for Generalized)